The material requirements of air ducts in the production process are quite particular. When the surface of the duct is made of aluminium foil, in order to ensure that the surface is not easily damaged, the material and thickness specified by the aluminium foil, the thickness of the aluminium foil and the composite duct specified by the surface reinforcement material are required.
Secondly, the bond between the inner and outer layers of the thin steel flange ventilation pipeline and the internal insulation material is one of the basic conditions to ensure the composite material. Over a certain area of plate defects, not only affect the service life of the pipeline, sometimes also reduce its insulation effect. Therefore, the defect should not exceed 6, in order to achieve the normal use of materials in the system.
At present, non-metallic pipeline materials are developing rapidly and have many varieties. In order to ensure the safety of use, the ducts made of these materials should have non-combustible or refractory B1 level combustion performance requirements according to engineering requirements, and the surface must be non-combustible materials. According to the engineering practice and product status of our country for many years, the minimum peeling strength test value of thermal and pressure sensitive adhesive tapes and the thickness value of aluminum foil are defined. The width of the tape should be no less than 50 mm, so as to prevent the use of the tape from failing to meet the sealing strength of the pipe wall and the service life of the pipeline. The advantage of hot adhesive tape is that it depends on the bonding of hot melt adhesive. As long as it is not heated, the surface of adhesive tape solidifies at room temperature, and the bonding strength is strong.
Only in the process of duct processing with quality assurance, duct can play its role, so that customers can achieve the desired results in use, truly satisfied with the service of duct.